Tried To Install New Card, monitor not responding.

Hi, i recently recieved a game as a gift and my old video card isn't strong enough to support it. It was a 64mb Geforce card. I bought a VisionTek X1300 pci video card. I went to install the card, the fan on the card starts up when i install it but it wont give me any signal on the monitor. I took it out, put my old one back in, installed the .net drivers on the cd and took it back out. Put the new one back in. No signal. Ok so i take it out once more to put the old one back in to give it another shot, and now it wont regcognize my old card now. So neither one of my cards are giving me any signal to my monitor. I finally got ahold of customer support and the only thing they told me was that i damaged my motherboard somehow while i was putting in the card! What!? Does anyone have any suggestions?